18898785401 has 2 divisors, whose sum is σ = 18898785402. Its totient is φ = 18898785400.

The previous prime is 18898785361. The next prime is 18898785419. The reversal of 18898785401 is 10458789881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10208071225 + 8690714176 = 101035^2 + 93224^2 .

It is an emirp because it is prime and its reverse (10458789881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18898785401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18898785431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449392700 + 9449392701.

It is an arithmetic number, because the mean of its divisors is an integer number (9449392701).

Almost surely, 2^18898785401 is an apocalyptic number.

It is an amenable number.

18898785401 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898785401 is an equidigital number, since it uses as much as digits as its factorization.

18898785401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5160960, while the sum is 59.

The spelling of 18898785401 in words is "eighteen billion, eight hundred ninety-eight million, seven hundred eighty-five thousand, four hundred one".